Liquid-sprayer.



J.,B. THORNYGROFT.

LIQUID SPRAYER.

APPLICATION FILED DBG. 11, 190s.

982,106. Patented Jan. 17, 1911.

Kga-M sierra srarns rar 1 ernten i LQUID-SPRAYER.

Specification of Letters Patent.

Patented Jan. i7, 1911.

Application led December 11, 1908. Serial N 0.467,033.

To all whom it 'may concern:

Be it known that I, JOHN EDWARD THoRNYoRoF'r, a subject of the King of Great Britain and Ireland, residing at Chiswiclr, in the county of Middlesex, England, have invented Improvements in Liquid- Sprayers, of which the following is a specification.

This invention relates to sprayers or burners more especially applicable for use with steam generators iired with liquid fuel.

The object of the invention is to provide a simple construction of sprayer or burner in which the co-acting screw threaded portions used for advancing and retracting the orifice controlling plug are, with appropriate modification, adapted to impart the necessary motion to the liquid to cause the same to issue in a very linely divided state. By this means the whole of the liquid is constrained to flow in a helical direction between the movable and stationary screw threads whereby it will be caused to issue from the sprayer in an advantageous manner and regulation of the How oi liquid can be etfectedby relative movement of the screw threaded parts. Furthermore, by the construction described, the total length of screw thread can be reduced as compared with that of sprayers or burners as hitherto proposed in which separate screw threaded portions are respectively employed to advance and retract the plug and to impart the necessary motion to the liquid.

The accompanying drawings illustrate two forms of an oil sprayer or burner, suitable for steam generators, constructed in accordance with the invention, Figure 1 being a complete central longitudinal section and Fig. 2 a partial central longitudinal section.

As shown in llig. 1, the nozzle plug lil is constituted by the partially spherical er;- tremity of a spindle h2 adapted to be rotated within the nozzle 'casing zo, as by means of a hand wheel w1; w2 is a stuffing box and w3 a gland to secure a tight joint between the spindle h2 and easing fw. The discharge orifice a: oir' the nozzle is formed` in a cap m1 which may be screwed upon the exterior of the `casin w and clamps the enu larged portion x2 o a cylindrical bloclr ma within the casing.v The spindle h2 is cut with a single square thread 71,3 of considerable depth which thread is reduced in diamspindle. be provided in the block w3 if desired.

eter externally toward the end constituting the orifice-controlling plug h1. The block w3 is bored at itsI forward end with an aperture equal in diameter to the smaller diameter of the threaded portion of the spindle h2 and is formed with an internal screw thread the bot-tom of which isof a diameter diminishing toward the orifice of the nozzle to correspond 'more or less with the exterior conical formation of the screw thread 11,3 on the front end of lthe spindle k2, so that a spiral lpassage m5 is formed between these partsy when the same are in t-he positions shown but lwhich can be gradually closed by advancing ,the spindle, it being preferred that the threads should be cutv so that the closure is edected at the extreme front end of the l.screw threads. The rear portion me of the block w3 is formed with a screw thread of lesser depth than the portion of the screw thread engaged therewith, so that a spiral pas sage m7 is formed enabling the liquid to pass directly from the main inlet y to the spiral passage and issue from such passage with a whirling motion when the spindle k2 is drawn back, the said passage w being gradually closed and the supply of liquid reduced and finally cut ed' upon advancing the 'fin intermediate chamber z may Fig, 2 illustrates a modiieation in which the screw thread ha is of uniform external diameter trom end to end, the diameter of the bottom of such thread howeverdiminishing from a suitable point in the length toward the partially spherical end h1. ln this case the forward part wt or the block Q03 is shaped to correspondmore or less to the diminished frontend portion of the screw threadedl spindle; and both parts m4 and m thereof are formed internally with a screw thread `the diameter of the bottom ort which is uniform from end to end and corresponds with the external. diameter of the screw thread fi.

ln. each case it will be seen that the whole ofthe liquid passing through the sprayer is constrained to 'flow throughthe lhelical passage `formed between the screw threaded parts and issue with a whirling mot-ion; that the 4cross sectional area of the outlet end of the said passage can be varied to .suit requirement; that by screwing the spindle forward,r4 any obstructing matter between the forward portions of the co-acting lscrew threaded parts can be crushedv and by screwing the spindle backward, yso as to fully open the said passage, the obstructing matter can be forced out ofthe sprayer by' the liquid. i

or decreased in size by the relative Ymovement between the screw-'threaded portions.

3. A liquid sprayer comprising relatively movable screw-threaded portions, the screwthreads thereof forming between them a liquid discharge passage, adapted to be increased or decreased in size or completely closed by the relative movement ofl the threaded portions. A

4. A liquid sprayer comprisingrelatively movable screw threaded portions the screw threads whereof form between them a helical liquid discharge passage the forward end portion of which is at a gradually decreasing distance from` the axis of the sprayer and is capable of being varied in 4cross sectional area and of being closed by` relative movement of said screw threaded portions. l

5. A liquid sprayer comprising relatively movable screw threaded portions the screw threads whereof form between them a helical liquid discharge passage which inV part remains of constant cross sectional area and in art varies in cross sectional area with re ative movement .between the said l portions.

6. .A liquid sprayer comprising a stationary casing having an internall screw threaded portion and an internal y coned discharge end with central liquid discharge orifice, and an orifice controllingplug having a vcorrespondingly scr'ew threaded portion adapted to form in conjunction with the co-acting internally screw threaded portion a helical liquid discharge passage communicating with the discharge. orifice and capable of being increased or decreased in size Ab y the relative movement between the screw-threaded portions.

7 A liquid sprayer comprising a station-l ary casing having internally screw threaded portions and a liquid discharge orifice, la Spindle capable of being rotated within the casin an orifice controlling plug upon the spind c and `an exterior screw thread engaging the internally screw Ythreaded portions of the casing and forming therewith a passage part vof which increases or diminishes in cross seotionalarea with rotation of the spindle. f

, 8. A liquid sprayer comprising a stationary casing having a liquid discharge open,

ing and internally .screw-threaded portions,

casing, a cap,` having a discharge orifice screwedupon the exterior of the casing, a.

hollowblock clamped to the casing by the cap, a screw thread upon theinterior surface of the block, a cylindrical orifice controlling plug extending'within the block, ascrew thread upon the exterior surface -of the plug engaging and forming with the screw thread uponv the block a helical vdischarge passage for the liquid to be sprayed, and a spindle for retracting and advancing the plugwith a rotary movement'to-vary the cross sectional area of the discharge end of the said helical passage.

10. A'liquid sprayer, comprising a nozzle casing, a cap having a discharge orifice screwed upon the exterior of vthe casing, a hollow block clamped to the casing bythe cap, having an interior annular chamber intermediate of itslength, a screw thread upon the internal surface of the block, a cylindrical orifice controlling plug extending within the block, a screw thread upon the exterior surface of the plug engaging andv forming with thev screw thread upon the block a helical discharge passage for the liquid to be sprayed, and a spindle .for retracting and advancing the plug with a rotary movement to vary the cross sectional area of the discharge end of the helical passave.l y l v l. A-fliquid sprayer comprising a spindle cut with'a square thread that is reducedin `diameter externally toward one end, a sta.- tionary casing having a discharge orifice and internal cylindrical portions -of different diameter, one of which is equal in diameter to the smaller diameter of the threaded portion of-the spindle andthe other portion is lOO larger in diameter than the said smaller diaf meter of the threaded portionof the spindle but less than the greatest diameter of the tliiqead on the spindle, van internal screw thread formed in one of the said cylindrical portions andthe bottomv of which is of'uniform diameter throughout its length, and an" internal screw thread formed in the other cylindrical portion the bottom of which is l of a diameter diminishing toward the orifice esame of the nozzle, and means for advancing and retractlng the spindle in its casing'. `.12. A liquid sprayer, comprising a stationary casing having a discharge orifice and internally screw-threaded portions divided by an interior annular chamber, a spindle cut with a thread that is reduced in diameter externally toward one end, the threads of the casing 1n front oit the chamber being equal 1n diameter to the smaller diameter of the threaded portion of the spindle and the threads on the part in the rear of the chamber being'larger than such diameter but less than the greatest diameter of the thread ot the spindle.

13. liquid sprayer comprising a spindle cut with a square thread that is reduced in diameter externallytoward one end, a nozzle casing, a cap screwed to the casing and havinga dlscharge orifice, a hollow block clamped to the casing bythe cap, part of the internal portion of which block is equal in diameter to the smaller 'diameter of the threaded portion of the spindle and another part otthe internal portion of the block` is larger 1n diameter 'than thel said smaller diameter ot' the threaded portion of the spindle but less than the greatest diameter of the thread on the spindle, separate internal screw threads formed in the said internal portions of the block, the bottom of one of the internal screw threads being of uniform diameter and the bottom of the other internal screw thread being` of a diameter diminishinzgtoward the orifice in the nozzle cap,

and means for advancing and retracting "the spindle in its casing.

14. A llquid sprayer comprising a spindle cnt with a square thread that is reduced in4 diameter externally toward one end, a nozzle casing, a cap screwed to the casing and having a discharge orifice, a hollow block clamped to the casing by the cap, part of the internal portion of which hlock is cylindrical and equal in diameter to the smaller diameter of fthe threaded portion of the spindle and part is larger than suchsmaller diameter of the threaded portion of the spindle but less than the greatest diameter of the thread op the spindle, an interior annular chamber 1ntermediate of the two parts of different diameter, separate'internal screw threads formed in the said two parts of different diameter,

'the bottom of one of the internal screw threads being of uniform diameter and the bottom of the other internal screw thread being of a diameter diminishing toward the oritice in the nozzle cap, and'means'for advancing and retracting the spindle in its casing.

l5. A liquid sprayer comprising a spindle cut with a square thread that is reduced in diameter externally toward one end, a nozzle casing, a cap secured to the casing and having a 'discharge orifice, a hollow block clamped to the casing by the cap, part ot the internal portion of which block is cylindrical and equal in diameter to the smaller diameter of' the threaded portion ot' the spindle and part is cylindrical and larger than such diameter but less than the greatest' diameter of the thread of the spindle, an internal thread formed in said block and interrupted intermediate its ends and diminishing toward the orifice in the nozzle cap, and ineans for turning said spindle in the casing. f

16. A liquid sprayer comprising a spindle cut with a square thread that is reduced in diameter externally toward one end, a nozzle casing inclosing said spindle, a cap screwed to the casing and having a discharge orifice, a hollow block clamped to the end ot' the casing by said cap and having a part of its internal portion cylindrical and screw-threaded and equal in diameter to the smaller diameter of the threaded portion of the spindle and another part screwthreaded and larger than such diameter but less than the greatest' diameter of the threads of the spindle, the threads formed on said block being interrupted intermediate the ends of the block and the bottom of said threads diminishing in diameter toward the orice in the nozzle cap, a stufng box carried by the opposite end of the casing and through which the spindle passes, means for turning' the spindle, and a nipple carried by 'the casing for attaching the oilv supply pi ie.

Signed at London England this 27th t ay ot `November 1908.

JOHN EDWARD ruoarrciwrr.

`Witnesses:

WM. R. SEWARD, JNo.` T. CHERRY. 

